Communication Protocols Support in PSoC® 3, PSoC 4, and PSoC 5LP Bootloader Component - KBA84744

Version: *D

 

Question:

What are the communication protocols supported by PSoC 3, PSoC 4, and PSoC 5LP Bootloader Component? What are the different bootloader hosts that can be used with PSoC 3, PSoC 4, and PSoC 5LP?

 

Answer:

The various communication protocols supported by the Bootloader Component (v1.50 in PSoC Creator4.0) are :

                                                                                                                                                                                                                                                                                                      
   
Communication
     Protocol
  
   
UDB or SCB
     implementation
  
   
App Note
  
   
Device
  
   
Bootloader Host Project provided
     with App Note
  
   
PSoC 3
  
   
PSoC 4
  
   
PSoC 5LP
  
   
PC
     Application
  
   
PSoC 3
     acting as
     a Host
  
   
PSoC 4
     acting as
     a Host
  
   
PSoC
     5LP
     acting as
     a Host
  
   
I2C
  
   
SCB
  
          
N/A
  
   
Yes
  
   
N/A
  
   
Yes
  
   
N/A
  
   
Yes
  
   
N/A
  
   
I2C
  
   
UDB
  
          
Yes
  
   
N/A
  
   
Yes
  
   
Yes
  
   
Yes1
  
   
No
  
   
Yes
  
   
SPI
  
   
UDB
  
          
Yes
  
   
Yes3
  
   
Yes
  
   
No
  
   
No1
  
   
No
  
   
Yes
  
   
UART
  
   
UDB
  
          
Yes
  
   
Yes
  
   
Yes
  
   
Yes
  
   
No1
  
   
No
  
   
Yes
  
   
USB(HID)
  
   
Fixed function
  
          
Yes
  
   
Yes4
  
   
Yes
  
   
Yes
  
   
N/A
  
   
N/A
  
   
N/A
  

For information on support for custom communication protocols, see the “Adding Bootloader Support” topic in the Component Author Guide (PSoC Creator > Help > Documentation > Component Author Guide) .

Note: PSoC Creator supports bootloading through SCB-based UART and SPI Components in PSoC 4.

1 PSoC 3 can be used as a bootloader host with modifications in the PSoC 5LP-based bootloader host project. However, because PSoC 3 has much lower flash size, a bootloadable project that works with PSoC 5LP may not work with PSoC 3 unless the flash space required by the bootloadable project can fit into PSoC 3’s flash. Therefore, it is recommended to use PSoC 5LP as the Bootloader host instead of PSoC 3. 

2 The Application note also explains how to create a Windows-based bootloader host.

3 Application note is not available. 

4 Only applicable for PSoC 4200L devices. Application note is not available.